I have been taking ogestrol tablets for almost a year now. I have had normal periods that start either a day before or a day after starting the sugar pills. but for the last 2 months in a row I have not had a period at all but do get some cramping like its going to start. i also noticed during this last birth control cycle that almost everytime i took my pill i would get cramping. Took pregnancy test they were negative. i also seem to get a little cramping when i need to urinate and having to urinate alot mkre frequently then normal.